Pliers



C. L. OHMAN Oct. 7, 1952 PLIERS Filed Sept. 15, 1951 IN VENTOR CARL L. OHMAN ATTORNEY Patented Oct. 7, 1952 PLIERS Carl L. Ohman, Vancouver, British Columbia, Canada Application September 15, 1951, Serial No. 246,796

2 Claims. (Cl. 81-513) My invention relates to improvements in pliers, which are adaptable for use as a wrench on nuts of largely diiferent sizes. I

The object of the invention is to provide means which will enable the pliers to be placed on opposing faces of hexagon or square nuts of different sizes, whereby when the jaws of the pliers are so placed they will be substantially in full bearing contact with the said nuts, so that an effective grip can be obtained without causing damage to the faces. A still further object is to provide a movement which when the pliers are properly adjusted at about the closure point upon a nut, a tight grip can be maintained with a relatively light pressure upon the plier handles.

The invention provides for the pivot pin on which one jaw is rocked about the other jaw to be adjustably positioned in one of said jaws, as will be more fully described in the following specification and shown in the accompanying drawings, in which:

Figure 1 is an elevational view of the plier set to grip small articles and with its jaws substantially closed.

Figure 2 is a similar view showing the jaws opened widely.

Figure 3 is a similar view showing the jaws widely spaced for closing onto large articles.

Figure 4 is an enlarged sectional view taken on the line 4-4 of Figure 1.

Figure 5 is an elevational view of the inside face of one head piece.

In the drawings like characters of reference indicate corresponding parts in each figure.

The numeral l indicates generally a hand lever having a head piece 2 and a jaw 3. The head piece 2 is provided with a short slotted opening 6 extending substantially parallel to the grip I of the jaw 3. A second lever 9 is provided, which has a head piece 10 and a jaw H extending from said head piece. The head piece I0 is provided with a long slotted opening l4 through which and the short slotted opening 6 a pivot bolt I5 is adapted to extend. Parallel to the slotted opening l4 in the head piece I0 is a slot 20, which is substantially vertical to the grip 22 of the jaw l I.

Projecting from the inner face of the'head piece 2 is a hardened pin 24, indicated in dotted line in Figures 1, 2 and 3, and in solid line in Figure 4, which rocks in the slot of the head piece It] and moves along said slot as the levers approach and recede from each other. Swingingly mounted from the head piece 2 upon a pin 26 is a second hand lever 28, the lower half of which is folded about the lever 9, as indicated sectionally in Figure 3 as at 29, to form a part upon which the fingers or the palm of the hand bears when using the plier. The lever 9 terminates at its lower end in an adjusting screw 30 upon which a nut 32 is threaded. The lower end of the hand lever 28 is fitted with a clip 33 having inturned fingers 34 which project into a groove 36 formed about the nut 32, thus providing a fulcrum 31 about which the lever 9 swings from the adjacent lower end of the hand lever 28. The fulcrum may be moved lengthwise of the lever 9 a distance equal-to about one-half the length of the slotted opening I4 in the head piece I0.

In use, the head pieces are moved in the line of the slotted opening l4 by manipulating the nut 32, which causes one side of the slotted opening 6 to thrust the bolt 15 along the slotted opening I4 to the position where the jaws are properly spaced for gripping the article to be worked upon. As the nut 32 is screwed up, the bolt l 5 will move to the right to set the jaws to a wider range. As the handles are drawn together the jaws will be turned about the bolt 15, the pin 24 will move to the left and upwardly of the slot 20 and the pin 26 will move to the right. i

What I claim as my invention is:

1. A plier comprising a hand lever having a head piece, a jaw and a slot extending obliquely of the head piece and a pin extending from a face of said head piece, a lever mounted for pivotal movement with respect to the hand lever, a second hand lever rockingly connected adjacent the free end of the lever, said second hand lever being pivotally connected to the first named hand lever, said lever having a head piece, a jaw and a slot in said head piece at right angles to said jaw in which the pin of the first named head piece has sliding movement, and a bolt connecting said head pieces together, said bolt also servmgkas a fulcrum about which the head pieces roc 2. A plier as claimed in claim 1, wherein the second named head piece is provided with a slotted opening extending substantially at right angles to the jaw of said head piece for the reception of the bolt and screw means adjacent the free end of the lever for adjustably locating the bolt in any desired position within said slotted opening.

CARL L. OHMAN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number I Name Date 73,289 Bounds Jan. 14, 1868 2,122,104 Martin June 28, 1938 2,125,406 Tetly Aug. 2, 1938 2,514,130 Jones July 4, 1950 

